Mass transfer in shell-core inorganic TIP1 ion exchanger |
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| Authors: | Yue Tingsheng Qui Ling Ma Yongli Liang Jianjun |
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| Institution: | (1) Department of Modern Physics, Lanzhou University, 730000 Lanzhou, P.R. China;(2) Department of Physics, Fudan University, 200433 Shanghai, P.R. China;(3) Shanxi Provincial Sanitary Epidemiological Station, 030012 Taiyuan, P.R. China |
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| Abstract: | The ion exchange processes of
(OAc–) and
(OAc–) proceeding in shell-core inorganic ion exchanger Ti (HPO4)2·1/2H2O has been studied and the diffusion equation whose boundary conditions are satisfied by a shell-core model was solved. Based on the equation solved and experimental data, the diffusion coefficients corresponding to the exchange process
(OAc–) and Li+–H+ (OAc–) at 17°C are found to be 7.7×10–9 and 6.2×10–8 cm2 s–1 and the activation energies 3.4×104 and 5.0×103 J mol–1, respectively. Compared to the gel type of styrene-divinylbenzene strong acid exchanger with 20% cross linking, it can be concluded that the rate of
or
exchange is 3.5 times faster than that in the organic exchanger.TIP was obtained from the Salt Lake Institute of the Academy of Science of China. |
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